1 files changed, 27 insertions, 0 deletions
diff --git a/spec/ruby/core/time/subsec_spec.rb b/spec/ruby/core/time/subsec_spec.rb
new file mode 100644
index 0000000000..3ed1bf5dd1
--- /dev/null
+++ b/spec/ruby/core/time/subsec_spec.rb
@@ -0,0 +1,27 @@
+require_relative '../../spec_helper'
+
+describe "Time#subsec" do
+  it "returns 0 as an Integer for a Time with a whole number of seconds" do
+    Time.at(100).subsec.should.eql?(0)
+  end
+
+  it "returns the fractional seconds as a Rational for a Time constructed with a Rational number of seconds" do
+    Time.at(Rational(3, 2)).subsec.should.eql?(Rational(1, 2))
+  end
+
+  it "returns the fractional seconds as a Rational for a Time constructed with a Float number of seconds" do
+    Time.at(10.75).subsec.should.eql?(Rational(3, 4))
+  end
+
+  it "returns the fractional seconds as a Rational for a Time constructed with an Integer number of microseconds" do
+    Time.at(0, 999999).subsec.should.eql?(Rational(999999, 1000000))
+  end
+
+  it "returns the fractional seconds as a Rational for a Time constructed with an Rational number of microseconds" do
+    Time.at(0, Rational(9, 10)).subsec.should.eql?(Rational(9, 10000000))
+  end
+
+  it "returns the fractional seconds as a Rational for a Time constructed with an Float number of microseconds" do
+    Time.at(0, 0.75).subsec.should.eql?(Rational(3, 4000000))
+  end
+end